Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 50W x 2+100W DC 12V-24V Audio Power Amplifier Module for DIY Bluetooth Audio and Store Home Theater with Treble and Bass Control

I used this to power a 35w tactile bass shaker. Haven't used the left and right channels or the Bluetooth function, but it gives plenty of power to the 'subwoofer'. This was so much cheaper than getting a dedicated subwoofer amplifier and does the job perfectly. I'm powering it with a 12v 2amp plug I had lying around and was surprised that it managed to power it given what is written in the instructions.

I bought this little amplifier, not believing it would work for the price. When I connected everything, I was shocked that it worked and produced such good sound. I recommend it!

Is perfect

So far so good

Did not work properly i dont like it the item was damaged

Before continuing, ignore the way it's put together in the photos for the listing, it's been assembled upside down (see the DC power going into the port labelled Aux-In, for example). The provided instructions are a poorly photocopied single sheet of A4, that don't provide any details about Bluetooth pairing and the likes, but that's fine - I only want to use a wired connection because I don't want any latency (it's for synthesisers). Fortunately it's not a hard thing to build - if you've got any sense at all you'll manage. It even comes with a terrible screwdriver to help you along the way! The entire case, which is just a top and bottom with the panel for the knobs already in place, is made from PCB material (the same as the PCB - crazy, I know!). Given the sides and back are open to the elements I guess its main purpose is to prevent fingers getting close to the heatsink. It's all quite 1980s futuristic, being black with silver for the labels! The provided knobs are also silver in colour, and just a bit too shiny for me so I'll swap them out later. All the hardware is provided, but there are no spare screws or anything which means that, if you drop one of the tiny screws, you might be in trouble. I dropped one... but I'd hoovered the workshop floor a minute beforehand so I found it very quickly. That's all my complaints done. It's actually a very capable little amplifier and can bring life back to speakers that you've had sat on the side for ages because they're too good to get rid of. For me it's using the speakers from an extremely old iPod dock - it hasn't been used since 30-pin connectors were abandoned - and it does a fine job of it. The subwoofer didn't make it but the main speakers sound good. I've not tried the Bluetooth, as explained, and I've only run it on a 12V supply because that's what I had to hand. It's a standard 5.5x2.1mm barrel jack, centre positive, and you've almost definitely got something that will power it in the house already. With better instructions, knobs and enough screws to be able to drop one without panic, it would be a five star review. As it stands, it's a good part to modify lightly for projects.

IT WORKS GREAT! AFTER I PUT IT TOGETHER I WAS TRYING TO CONNECT IT TO BLUETOOTH BUT IT WOULDN'T I THOUGHT T WAS DEFECTIVE OR THEY SENT ME THE WRONG ONE. TURNE OUT IT WAS CONNECTING TO THE NEIGHBORS DEVICE. EVEN THOUGH THIS AMP DOESN'T SAY NLUETOOTH ON IT, IT IS IN FACT 100% BLUETOOTH ENABLED. I'M SO I WAS BUMMED THAT I WAS GOING TO HAVE TO RETURN IT BUT NOW I DON'T HAVE TO. (OPERATOR ERROR) I REALLY LIKE THE ANALOG FEEL OF THE KNOBS, THEY'RE NOT FLOPPY OR LOOSE AND THEY CAN BE DIALED IN NICELY. JUST REMEMBER THERE IS NO POWER CORD INCLUDED WITH THIS AMP, SO MAKE SURE TO BUY ONE. I'M USING A 20V POWER SOURCE TO RUN IT AND IT WORKS JUST FINE. EASY TO BUILD TOO. IT WEIGHS ABOUT AS MUCH AS A PAIR OF EYEGLASSES. I LIKE IT SO FAR & I'M JUST USING IT TO RUN A DUAL SUBWOOFER TO SOME OLD 3-WAY AIWA 250W SHELF SPEAKERS FROM 2001 IN THE GARAGE AND IT SOUNDS GOOD.

Did everything I expected it to do. Was a great addition to a Bluetooth speaker.

I have to rewrite this review because apparently it makes people look bad. I received a used item. I finished the assembly, and am buying a 12V adapter today to see if it works. It looks to be a good item, and while mine was not exactly pristine, it shouldn’t have any issues as it looks by all accounts to be in good working order. If it works, I’ll be updating with a sound test video as I am using it for a custom piece of art that plays music. The unit itself is brilliant in its design and simplicity. The only real issue that I can see going forward is you are going to want to use thinner wire than the heavy gauge stuff that I was going to use originally. A connector might bridge the gap just fine, though. The switch for the on off is tight, and gives a solid click when shut off, not spongy. The other knobs turn smoothly and assembly on this is very simple. Very small screws, so if you have big hands get yourself a magnetized screwdriver so you don’t lose them. Took all of 5 minutes to assemble out of the box, though there was one nut already affixed. It is also labeled 12-24V which means you have some options to power it with and it has a headphone jack to connect it via aux channel. Bluetooth, is the other option which I think might be easier if you are just using it to power some speakers. It is a solid design, and if it works, I hope it holds up for a long time. Good value for the money.

Parfait pour recycler un ensemble d'enceintes passives 2.1, et les rendre connectées. Convient très bien pour mon usage.

lots of disconnects. very particular to the PSU you use. very hard to use with multiple devices - impossible